Who are they?

Among photos from a purchased antique album in Seattle Washington. Photo was taken in Ripon, Wisconsin. Only 'clue' was on a piece of cardboard, "Walter Moldenhauer, April 1904" written on it. Some of the photos were from Prussia. Looking for family to give photos to!

Who are these girls? Why did the photo, along with others, end up in an antique store in Seattle, Washington? The story starts in Prussia, where some of the photos were taken, and goes to Ripon, Wisconsin. Many of the photos in the group were taken at Lockwood's Studio...In the late 1800's, maybe???